Number Format

Numbering range information

20 March 2008 - expansion to 8-digit national numbering

In 2009, national numbering expands to 8-digit format, where digit
'2' was prepended to existing fixed/wireline numbers, while digit
'8' was prepended to mobile numbers (not '3' as previously
reported here). Permissive use of 7-digit numbers was in effect
until 20 September 2008 after which the 8-digit numbers became
mandatory.

30 March 1994 - 7-digit national numbers

Costa Rica expanded its telephone numbers from a 6-digit to a 7-digit
format on 30 March 1994. In most cases, a digit was prepended to
existing numbers. About 15% of the numbers involved changes to the
first 2 or 3 digits of the old numbers.